Police have arrested a man on suspicion of carrying out the explosive attack on the Borussia Dortmund team bus before last Tuesday’s Champions League game against Monaco.

Notes discovered at the scene (immediately described by investigators as “dubious”) appeared to claim responsibility in the name of Islamic extremists, though prosecutors are now alleging that the motive may, somewhat oddly, be entirely financial.

According to the Independent, a 28-year-old German-Russian citizen known only as ‘Sergej W’ was arrested by a police tactical response unit on Friday morning in connection with the attack, that left defender Marc Bartra needing surgery on a broken arm.

He [Sergej W] has been charged with attempted murder, causing an explosion and serious bodily harm, police said.

It’s also being reported that Sergej W instigated the bombing to negatively effect the price of shares he’d previously bought in Borussia Dortmund themselves.